I have not found any difficulty in dissolving 2 grams of Metol in 100 ml water at room temperature. If my explanation of the mixing instructions given in Hardy & Perrin is not the right one, what is? They gave none in that book, but may have in another publication.
Originally Posted by Ian Grant
Maybe Metol available in the 30's did have a possible oxidized component. Oxidized Metol is a development inhibitor. Sulfite converts it to the sulfonate, which at least is a weaker developing agent. Hydroquinone + sulfite regenerates oxidized Metol, as does an ascorbate. If their method is no longer needed, it still might do some good and no harm. There is no appreciable increase in time required for preparation.